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WO2006000378A3 - Contactless capacitative filling level measurement - Google Patents

Contactless capacitative filling level measurement Download PDF

Info

Publication number
WO2006000378A3
WO2006000378A3 PCT/EP2005/006683 EP2005006683W WO2006000378A3 WO 2006000378 A3 WO2006000378 A3 WO 2006000378A3 EP 2005006683 W EP2005006683 W EP 2005006683W WO 2006000378 A3 WO2006000378 A3 WO 2006000378A3
Authority
WO
WIPO (PCT)
Prior art keywords
filling level
capacitative
contactless
level measurement
reception electrode
Prior art date
Application number
PCT/EP2005/006683
Other languages
German (de)
French (fr)
Other versions
WO2006000378A2 (en
Inventor
Martin Stelzle
Martin Winter
Original Assignee
Accelab Gmbh
Martin Stelzle
Martin Winter
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Accelab Gmbh, Martin Stelzle, Martin Winter filed Critical Accelab Gmbh
Publication of WO2006000378A2 publication Critical patent/WO2006000378A2/en
Publication of WO2006000378A3 publication Critical patent/WO2006000378A3/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • G01F23/266—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors measuring circuits therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • G01F23/265—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors for discrete levels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
    • G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
    • G01F23/268—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors mounting arrangements of probes

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

A device for contactless capacitative filling level measurement of a medium (7) in a vessel (6) with at least sections of electrically non-conducting wall areas, wherein at least one transmission electrode (1) and at least one reception electrode (2,2',2',2' ) are provided, partially surrounding the vessel (6) with the medium (7). The invention is characterized in that an electrically conducting shield (3) fully covers at least one reception electrode on the side facing away from the vessel (6) and is electrically insulated from the reception electrode (2,2',2',2' ). As a result, it is possible to receive stable filling level signals devoid of interference on the reception electrode (2,2',2',2' ) even during simultaneous operation of other devices with high-frequency voltage sources, even when there are high interference field amplitudes in the immediate vicinity of the device, for contactless capacitative filling level measurement.
PCT/EP2005/006683 2004-06-25 2005-06-21 Contactless capacitative filling level measurement WO2006000378A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004030740.7 2004-06-25
DE200410030740 DE102004030740A1 (en) 2004-06-25 2004-06-25 Non-contact capacitive level measurement

Publications (2)

Publication Number Publication Date
WO2006000378A2 WO2006000378A2 (en) 2006-01-05
WO2006000378A3 true WO2006000378A3 (en) 2006-07-06

Family

ID=35507952

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/006683 WO2006000378A2 (en) 2004-06-25 2005-06-21 Contactless capacitative filling level measurement

Country Status (2)

Country Link
DE (1) DE102004030740A1 (en)
WO (1) WO2006000378A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7794737B2 (en) 2003-10-16 2010-09-14 Kimberly-Clark Worldwide, Inc. Odor absorbing extrudates
DE102011054133A1 (en) 2011-10-01 2013-04-04 Hamilton Bonaduz Ag Level measuring device for humidifier
DE102014114943B3 (en) 2014-10-15 2015-07-16 Endress + Hauser Gmbh + Co. Kg Vibronic sensor
CN113984138B (en) * 2021-09-10 2023-09-05 中国航空工业集团公司西安航空计算技术研究所 Aviation fuel measurement system based on FFT (fast Fourier transform) spectrum analysis

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3218863A (en) * 1962-05-07 1965-11-23 Wayne Kerr Lab Ltd Pressure responsive apparatus
US4749988A (en) * 1986-11-20 1988-06-07 Imtec Products, Inc. Non-invasive liquid level sensor
US5582798A (en) * 1995-02-23 1996-12-10 Cyberlab Inc. Volume sensing device
DE19645970A1 (en) * 1996-11-07 1998-05-14 Heinz Dipl Ing Ploechinger Capacitive level sensor for measuring filling level of liquid in container

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3218863A (en) * 1962-05-07 1965-11-23 Wayne Kerr Lab Ltd Pressure responsive apparatus
US4749988A (en) * 1986-11-20 1988-06-07 Imtec Products, Inc. Non-invasive liquid level sensor
US5582798A (en) * 1995-02-23 1996-12-10 Cyberlab Inc. Volume sensing device
DE19645970A1 (en) * 1996-11-07 1998-05-14 Heinz Dipl Ing Ploechinger Capacitive level sensor for measuring filling level of liquid in container

Also Published As

Publication number Publication date
WO2006000378A2 (en) 2006-01-05
DE102004030740A1 (en) 2006-01-19

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